From b0d7e15a9f21919382075980a5da9ed85ddfcd11 Mon Sep 17 00:00:00 2001 From: Ryan Roberts Date: Wed, 1 May 2024 15:44:39 +0100 Subject: [PATCH] mm/debug_vm_pgtable: test pmd_leaf() behavior with pmd_mkinvalid() An invalidated pmd should still cause pmd_leaf() to return true. Let's test for that to ensure all arches remain consistent. Link: https://lkml.kernel.org/r/20240501144439.1389048-1-ryan.roberts@arm.com Signed-off-by: Ryan Roberts Reviewed-by: Anshuman Khandual Reviewed-by: David Hildenbrand Cc: Catalin Marinas Signed-off-by: Andrew Morton --- mm/debug_vm_pgtable.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c index f1c9a2c5abc0..b104a353b532 100644 --- a/mm/debug_vm_pgtable.c +++ b/mm/debug_vm_pgtable.c @@ -982,6 +982,7 @@ static void __init pmd_thp_tests(struct pgtable_debug_args *args) #ifndef __HAVE_ARCH_PMDP_INVALIDATE WARN_ON(!pmd_trans_huge(pmd_mkinvalid(pmd_mkhuge(pmd)))); WARN_ON(!pmd_present(pmd_mkinvalid(pmd_mkhuge(pmd)))); + WARN_ON(!pmd_leaf(pmd_mkinvalid(pmd_mkhuge(pmd)))); #endif /* __HAVE_ARCH_PMDP_INVALIDATE */ }